Error in CMAQv5.3.1 CCTM

I am copying Carlie Coat’s answer to this question from your other issue: Making time-independent ICON regrid file using CMAQv5.3.1

You need to use M3Tools program m3tshift with an output time-step of 0. See https://cjcoats.github.io/ioapi/M3TSHIFT.html